Home / 8,142.30-12,216.99-3,215.54

Finding the Fourth Proportional to 8,142.30, 12,216.99 and 3,215.54

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Solution

The fourth proportional to 8,142.30, 12,216.99 and 3,215.54 is: 4,824.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,142.30 : 12,216.99 = 3,215.54 : x
  2. Step 2: Convert to fraction form
    8,142.30/12,216.99 = 3,215.54/x
  3. Step 3: Cross multiply
    8,142.30x = 12,216.99 × 3,215.54
  4. Step 4: Simplify right side
    8,142.30x = 39,284,220.02
  5. Step 5: Solve for x
    x = 39,284,220.02/8,142.30
  6. Step 6: Final answer
    x = 4,824.71

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.